Dust filter for cleaning robot



1.1 is a front view showing a first dust filter for a cleaning robot;

1.2 is a cross-sectional view taken along line A-A in 1.1 ;

1.3 is a cross-sectional view taken along line B-B in 1.1 ;

1.4 is a back view thereof;

1.5 is a left view thereof;

1.6 is a right view thereof;

1.7 is a top view thereof;

1.8 is an enlarged top view thereof;

1.9 is a bottom view thereof;

1.10 is an enlarged bottom view thereof;

1.11 is a front, bottom perspective view thereof;

1.12 is a front, top perspective view thereof;

1.13 is a back, top perspective view thereof;

2.1 is a front view showing a second dust filter for a cleaning robot;

2.2 is a cross-sectional view taken along line A-A in 2.1 ;

2.3 is a cross-sectional view taken along line B-B in 2.1 ;

2.4 is a back view thereof;

2.5 is a left view thereof;

2.6 is a right view thereof;

2.7 is a top view thereof;

2.8 is an enlarged top view thereof;

2.9 is a bottom view thereof;

2.10 is an enlarged bottom view thereof;

2.11 is a front, bottom perspective view thereof;

2.12 is a front, top perspective view thereof; and

2.13 is a back, top perspective view thereof. 

CLAIM The ornamental design for a dust filter for a cleaning robot, as shown and described. 